93LC56AX-I/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC56AX-I/SN is a 2Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for non-volatile data storage applications requiring Microwire serial interface communication. This device operates across a supply voltage range of 2.5V to 5.5V and is housed in an 8-SOIC surface mount package. The part maintains Active product status and is ROHS3 compliant, making it suitable for modern electronic applications requiring environmental compliance.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory availability, supply chain considerations, or specific application voltage requirements while maintaining functional compatibility.

Key Parameters

Parameter	Specification
Memory Type	Non-Volatile EEPROM
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	Microwire
Clock Frequency	2 MHz
Write Cycle Time	6ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 93LC56AX-I/SN are identified based on strict equivalence across the following critical parameters:

Memory Capacity & Organization: All substitute parts maintain 2Kbit capacity with 256 x 8 organization, ensuring direct functional replacement without firmware or software modification.

Serial Interface Protocol: All candidates utilize Microwire interface operating at 2 MHz clock frequency, guaranteeing protocol-level compatibility with existing circuit designs.

Package & Mounting: All substitute parts are housed in 8-SOIC surface mount packages with identical 0.154" (3.90mm) width, enabling direct PCB footprint compatibility without layout redesign.

Electrical Characteristics: Write cycle time of 6ms is maintained across all substitutes. Operating temperature range of -40°C to 85°C is consistent across all parts.

Compliance & Certifications: All substitute parts maintain ROHS3 compliance, MSL rating of 1, and REACH unaffected status, ensuring regulatory equivalence.

Voltage Supply Variation: The 93AA56A-I/SN operates across an extended voltage range of 1.8V to 5.5V, compared to the main part's 2.5V to 5.5V range. This represents a superset of the original specification and is therefore substitutable in applications operating within the original voltage window.

Parameter Comparison

Parameter	93LC56AX-I/SN (Main Part)	93AA56A-I/SN	93LC56A-I/SN
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Memory Size	2Kbit	2Kbit	2Kbit
Memory Organization	256 x 8	256 x 8	256 x 8
Memory Interface	Microwire	Microwire	Microwire
Clock Frequency	2 MHz	2 MHz	2 MHz
Write Cycle Time	6ms	6ms	6ms
Voltage Supply Range	2.5V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both 93AA56A-I/SN and 93LC56A-I/SN are qualified substitutes for the 93LC56AX-I/SN based on functional equivalence and regulatory compliance.

93AA56A-I/SN: This part is manufacturer-recommended and verified as programmable. It offers extended voltage supply range capability (1.8V to 5.5V), providing operational flexibility in applications with lower supply voltage requirements. Current inventory availability is 2200 units.

93LC56A-I/SN: This part is manufacturer-recommended and verified as programmable. It maintains identical voltage supply range (2.5V to 5.5V) and all other electrical specifications as the main part. Current inventory availability is 3652 units.

All three parts maintain Active product status, ROHS3 compliance, and identical package specifications. Selection between substitutes should be based on application voltage requirements and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can 93AA56A-I/SN be used as a direct replacement for 93LC56AX-I/SN?

A: Yes. Both parts share identical memory capacity (2Kbit), organization (256 x 8), Microwire interface, clock frequency (2 MHz), write cycle time (6ms), operating temperature range (-40°C to 85°C), and 8-SOIC package specifications. The 93AA56A-I/SN operates across an extended voltage range (1.8V to 5.5V) that encompasses the original part's 2.5V to 5.5V specification, making it functionally equivalent for applications within the original voltage window.

Q: Can 93LC56A-I/SN be used as a direct replacement for 93LC56AX-I/SN?

A: Yes. Both parts are identical in memory capacity, organization, interface protocol, clock frequency, write cycle time, voltage supply range (2.5V to 5.5V), operating temperature, and package type. No circuit modifications are required.

Q: Are there any package or PCB layout considerations when substituting these parts?

A: No. All three parts use the identical 8-SOIC surface mount package with 0.154" (3.90mm) width. PCB footprints and assembly processes remain unchanged.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (Unlimited). Regulatory and environmental compliance requirements are equivalent.

Q: What is the primary difference between the substitute parts?

A: The 93AA56A-I/SN operates across a wider voltage supply range (1.8V to 5.5V) compared to both the main part and 93LC56A-I/SN (2.5V to 5.5V). The 93LC56A-I/SN maintains identical specifications to the main part. Both are suitable substitutes; selection depends on application voltage requirements and inventory availability.

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